getting error such max_requests set too low in configurations

Hi,Getting following error when using  free radius under heavy load,Thu Feb  2 20:18:00 2017 : Error: Dropping request (13057 is too many): from client  port 41215 - ID: 244Thu Feb  2 20:18:00 2017 : Info: WARNING: Please check the configuration file.     The value for 'max_requests' is probably set too low. Thu Feb  2 20:18:00 2017 : Error: Dropping request (13057 is too many): from client  port 40991 - ID: 192Thu Feb  2 20:18:00 2017 : Info: WARNING: Please check the configuration file.     The value for 'max_requests' is probably set too low.Please let me know, what might be the problem and resolution for the problem. Thanks & regardsManjunath